Improved preparation for polishing metallic surfaces



CHARLES MsROWL EY, OF CHICAGO, ILLINOIS.

Letters Patent No. 87,793, dated Mwrch 16, 1869.

IMPROVED PREPARATION FOR POLISHING METALLIC SURFACES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

ing one part, by weight, of oil of vitriol with twenty parts of water, and adding one part of the dilute acid obtained to one part of dilute hydrochloric acid, made by adding six to ten parts of water to one part of common hydrochloric acid, and then adding the pumicestone, in fine powder, and in the proportion of one part to eight parts of the'mixed dilute acids.

These propoltions are not essential, but may be varied greatly, without detriment, provided only great dilution be maintained. I add to the above, one part of fullers earth and one-sixteenth of a part of borax, in cases where there is grease to be removed, or where the best effect is desired, and where the expense is not an objection.

The advantage and usefulness of this invention are in the fact that the most rapid and effective polishing and cleaningaction is obtained upon the greatest variety of metallic-surfaces, owing to the combination of the two acids, aided by the mechanical action of the pumicestone and the grease-removing action of the borax and the fullers earth.

I am aware that these acids, and also pumice-stone, have separately been used for similar purposes; but

hat I claim, is-

The combination of the acids above described with the polishing-powder above described, with or without the borax and fullers earth, also above described, the same being used for the purposes specified.

CHARLES M. ROWLEY.

Witnesses:

W. H. BULLOCK, G. A. MARINER. 

